Copper foam could be used as filter for COVID-19 masks


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Face masks have become a common method of protection during the COVID-19 pandemic . A new copper foam could make those masks work even better. The lightweight new material is washable and recyclable.

Face masks have become a vital tool in a showing the spread of the virus that causes COVID-19. They help filter or block spit or mucus droplets that carry infectious particles. Even homemade fabric masks can do a good job. But many are not very durable. Now, researchers have come up with a new sort of filter for use in masks. Made of copper, it’s sturdy and lightweight. The sponge-like material also is easy to clean and can be recycled. In tests, it outperformed the filtering ability of a standard N95 mask. It might even trap and kill bacteria, its developers say.

Masks to guard against viruses can be made of many different materials. Some fabric ones…

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